2583360

Appears in sequences

• Coordination sequence for diamond structure D^+_6. (Edges defined by l_1 norm = 1.)at n=25A035879
• If X_1,...,X_n is a partition of a 2n-set X into 2-blocks then a(n) is equal to the number of 5-subsets of X containing none of X_i, (i=1,...n).at n=22A130811